Re: [syzbot] [jfs?] general protection fault in diRead (2)

From: syzbot
Date: Fri Jul 19 2024 - 20:16:38 EST

syzbot has found a reproducer for the following issue on:

HEAD commit: 4305ca0087dd Merge tag 'scsi-misc' of git://git.kernel.org..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=119980b1980000
kernel config: https://syzkaller.appspot.com/x/.config?x=dfaf0ab1b18403fe
dashboard link: https://syzkaller.appspot.com/bug?extid=8f731999dc47797f064f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14d09349980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1748fa5e980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/dd4bd188fcdc/disk-4305ca00.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d60a35331483/vmlinux-4305ca00.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8a5740b15da1/bzImage-4305ca00.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/fb21716fe5a7/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8f731999dc47797f064f@xxxxxxxxxxxxxxxxxxxxxxxxx

R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9841c06c
R13: 0000000000000001 R14: 431bde82d7b634db R15: 00007fff9841c0b0
</TASK>
read_mapping_page failed!
jfs_mount_rw: diMount failed!
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827]
CPU: 0 PID: 5094 Comm: syz-executor169 Not tainted 6.10.0-syzkaller-09061-g4305ca0087dd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 a9 e5 d7 fe 4c 8b 2b 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 89 e5 d7 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc900020bf738 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88805a2bcdf0 R08: ffff88805a2bca97 R09: 1ffff1100b457952
R10: dffffc0000000000 R11: ffffed100b457953 R12: 0000000000000004
R13: 0000000000000000 R14: ffff88805a2bca88 R15: dffffc0000000000
FS: 00005555843c1380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13f837b0f8 CR3: 000000005a8e8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
jfs_iget+0x8c/0x3b0 fs/jfs/inode.c:35
jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469
__lookup_slow+0x28c/0x3f0 fs/namei.c:1718
lookup_slow+0x53/0x70 fs/namei.c:1735
walk_component+0x2e1/0x410 fs/namei.c:2039
lookup_last fs/namei.c:2542 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2566
filename_lookup+0x256/0x610 fs/namei.c:2595
user_path_at+0x3a/0x60 fs/namei.c:3002
do_mount fs/namespace.c:3809 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13f8304bd9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1b 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff9841c048 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff9841c070 RCX: 00007f13f8304bd9
RDX: 0000000000000000 RSI: 0000000020000380 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007fff9841c090
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9841c06c
R13: 0000000000000001 R14: 431bde82d7b634db R15: 00007fff9841c0b0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 a9 e5 d7 fe 4c 8b 2b 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 89 e5 d7 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc900020bf738 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88805a2bcdf0 R08: ffff88805a2bca97 R09: 1ffff1100b457952
R10: dffffc0000000000 R11: ffffed100b457953 R12: 0000000000000004
R13: 0000000000000000 R14: ffff88805a2bca88 R15: dffffc0000000000
FS: 00005555843c1380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13f837b0f8 CR3: 000000005a8e8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 8d 5d 80 lea -0x80(%rbp),%ebx
3: 48 89 d8 mov %rbx,%rax
6: 48 c1 e8 03 shr $0x3,%rax
a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
f: 74 08 je 0x19
11: 48 89 df mov %rbx,%rdi
14: e8 a9 e5 d7 fe call 0xfed7e5c2
19: 4c 8b 2b mov (%rbx),%r13
1c: 49 8d 9d 20 08 00 00 lea 0x820(%r13),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 89 e5 d7 fe call 0xfed7e5c2
39: 4c 8b 3b mov (%rbx),%r15
3c: 49 8d 5f 28 lea 0x28(%r15),%rbx


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